Openmaptiles: Transparent islands in France

[maxkey]

OpenStreetMap has normal islands that are transparent at OpenMapTiles. There are no land polygons in OpenMapTiles vector tileset at this place.
https://maputnik.github.io/editor/#10/46.0698/-1.4028

OpenMapTiles:

OSM:

[freeman40]

This is a layer ordering issue. The water layer is drawn over the top of the landcover areas, and so hides the islands.

[pathmapper]

Most of the island areas "missing" are class = wetland (from source layer landcover) and
class = lake (from source layer water).

class = wetland

class = lake

On the OSM screenshot there are no such big lakes visible, so the areas with class = lake are likely a problem with the vector tile source.

The missing wetland layer could be added to the style but could have side effects for other areas.

The problem exists also with other OMT styles.

[jirik]

It's not layer ordering issue. We do not encode islands (or generally land) polygons into openmaptiles. The problem here is that water filled islands in Bay of Biscay, because someone broke it's outer ring few weeks ago. I've fixed it 3 days ago:
https://www.openstreetmap.org/changeset/59569530
The fix should be automatically propagated to free.tilehosting.com next week.

[freeman40]

@jirik Oops, yes you're right. One cannot solve this by moving the water layers to be beneath the landcover layers because then things like lakes on golf courses would not show up. Sorry, I had a momentary brain lapse.